US2188300A - Ventilating shutter on venetian blinds - Google Patents

Description

Jan. 30, 1940. MlsHLENIcK 2,188,300

VENTILATING SHUTTER ON VENETIAN BLIND S Filed March 22, 1939 2 Sheets-Sheet 1 INVENTOR. Mar M504 EN/CK.

Jan. 30, 1940. M|5HLEN|cK 2,188,300

VENTILATING SHUTTER 0N VENETIAN BLINDS Filed March 22, 1939 2 Sheets-Sheet 2 1NVENIOR. MCK MsI/LEN/c K.

Q/MQW) ATTORNEY.

Patented Jan. 30, 1940 UNITED STATES 2,188,300 VENTILATING SHUTTER ON VENETIAN BLINDS Nick Mishlenick, Brooklyn, N. Y. Application March 22, 1989, Serial No. 263,390

10 Claims.

The principal object of the invention is to.

' provide a Venetian blind structure adapted for installation either exteriorly or interiorly of a window structure and including a plurality of slats operatively connected together at their ends by a lazy-tongs or toggle linkage operatively mounted within a frame including guide tracks to be affixed to each side of the window structure.

A further object of the invention is'to provide a locking mechanism to be housed within a casing interconnecting the guide tracks at their lower ends and forming the bottom of the frame and arranged to lock the Venetian blinds in their lowered position, the Venetian blinds further including a latch mechanism for locking the slats thereof in any desired adjustedposition aswell as for locking the Venetian blind' in its upper most raised position..

with the foregoing and other objects in view. the invention resides in the :novel arrangement and combination of parts and in the details of construction hereinafter described and claimed.

- it being understood.thatchanges inthe precise embodiment of the invention. herein disclosed may be made within the scope of what is claimedwithout departing from the spirit of the invention. c 7

A practical embodiment of the invention is-,il-. lustrated in the accompanying drawings wherein: Fig. 1 is a view of a window from :the" inside of the building, with two sets of Venetian blinds, both y Fig. 2 is a view similar to Fig.1,but the top set of Venetian blinds isishown'raised. while the lower set is shown open.

Fig. 3 is a view of a window from the outside of the building with a modified form of single Venetian blind, shown closed, for anentirewlndow.

Fig. 4 is an enlarged partial detail view of the Venetian blind locking mechanism.

Fig. 5 is a sectional view on line 5-, Fig. 2. Fig.- 6 is an enlarged sideelevatlonal view of the Venetian blind raising mechanism in lowered position. Fi '7 is an enlarged side elevational view of the raising mechanism in raised position.

Fig. 8 is a detail viewoi a guide Fig. 9 is a plan insection of the bottom horizontal or the name supporting the Venetian blind-: showin:

mechanism used to keep the Venetian blind in its lowered position. v Referring now to the drawings by numerals of reference, and particularly to Figs. 1 and 2, l0 denotes the supporting frame of a Venetian '5 blind which is formed to snugly fit within onehalf. of a window opening, there being utilized in the window two such frames in superposed relation as clearly shown. In Fig. 3 a single frame "la is utilized which fits entirely within 10 the window openingand as mounted is shown disposed exteriorly of the window while the halfframes in shown in Figs. 1 and 2, are disposed 'interiorly of the window.

netian blind construction, locking and latching 15 mechanisms as well as operating mechanism are identical regardless of the size of frame supporting structure, a description will only be given as to. one frame supporting structure it and Ve netian blind H suppo t thereby. 20 The frame it comprises vertical guide tracks I2 formedpreferably of sheet metal rectangular in cross-section and provided on its inner face It with a longitudinal center slot it. At their lower "ends the guide tracks I! are rigidly con- 25 nected in any desired manner by a horizontal frame member 1! .of wood or metaL'a similar frame member [5 being connected to the upper ends'o! the guide tracks. Obviously the width and length of the window opening will determine sothe dimensions of the guide tracks 12 and upper and lower horizontal members I! and i6 which in'their interconnected relation define the frame supporting structure It, which is attached to the window frame ll by means of screws such 88- as", as shown in'Fig. 5.

Arranged within each guide track I! is a toggle linkage 2|! of the lazy-tongs or parallelogram type comprising crossed links 2| pivotally connected at their centers as at '22, and at their ends 4w as at 21c see Fig. 6. The length of the lazytongs linkage in is such that in its extended position it will substantially equal the length of the guide track l2. Fitted between the guide tracks 12 are the slats 25 of the Venetian blind 45 which may be formed of wood, metal or any other suitable material. Each slat 25 is pro-'- vided at each end with an axial pin 26 carried by a bracket 25:: which pin is so connected to each-pair of crossed links M as to constitute so the pivotal connection 22 thereof, the connection being such that the slats 25 and the connected lazy-tongs linkage 20 at each end thereof form a unit handled-structure. The lowermost pair of crossed links H are pivotally connected by a Inasmuch as the Ve-,

pair of links 21 as at 28 to an L-shaped latch.

. mediate links 2|b is provided with an angular extension 33, both extensions being on the same side of the lazy-tongs linkage 20. Connecting the extensions 32 and 33 is a tension coil spring 34 which is of a strength such as to contract the lazy-tongs linkage 20 and thereby raise the Venetian blind as shownin-Figs. 2 and '7. As the lazy-tongs linkages 20 are completely housed within the guide tracks l2, the raising or lowering of the Venetian blind is guided thereby, the slats 25 being retained in their vertical relationship by the pins 26 slidably guided within the,

slots I 4 of the track guides l2. 4

In order to simultaneously rotate the slats 25 into open or closed position, the same are connected together at their forward edges by a lazytongs linkage 35, comprising crossed links 36 pivotally connected together at their centers as at 31 and at their ends as at 38. Secured to the forward edge 25a of each slat 25 is a clip 46 having ears 4| between which is'rotatably mounted by means of pin 42, a sleeve 43. Each sleeve 43 has fixed thereto a laterally projecting pivot. pin 31 which serves as the above mentioned pivotal connection for the cross-links 36. Secured to the lowermost slat 25 is a ring or knob 45 to facilitate the adjustment of the slats 25 into any desired angular position from completely open, see Fig. 2, to completely closed see Figs. 1 and 3.

Thus movement of the lowermost slat 25 will be transmitted by the lazy-tongs linkage 35 to impart a like movement-to each of the other slats 25, said lazy-tongs linkage 35 further co-acting with the lazy-tongs linkages 20 in the raising or lowering of the Venetian blind. If desired, in order to lock the lazy-tongs linkage 35 so as to prevent contraction thereof there is provided a hook latch 46 pivotally connected as at 36a. to one of the cross-links 36, .the hook latch 46 'being adapted to engage an extensionv formed on the opposite pivot 381). This locking of the lazytongs linkage 35 will insure a rigid interconnection between the slats 25 to effect their simultaneous adjustment,'and will further act to prevent unintentional raising of the Venetian blind.

Attached to the upper edge 25a of the lowermost slat 25, see Fig. 4 at one end thereof is a latch 56 carrying a spring pressed bolt 5| pro-,

vided with a handle 52. Provided on the inner face l3 of the guide-track |2"and adjacent the latch 50 (when the Venetian blind is in its lowered position) is an arcuate row of openings 53 each of which is adapted to receive the bolt 5| for locking the slats 25 in selected angular adjusted position. Adjacent the top of the guide track I2 is an opening'54 which is adapted to co-act with the latch bolt 5| for permanently holding the Venetian blind in its raised position, thus relieving the springs 34.

In order to hold the Venetian blind 111 its lowered position against the action of the springs 34 tending to raise the same there is provided a locking mechanism carried within the lower horizontal frame member |5. Formed in the frame member I5 is a central recessed opening 66 with which communicates an axial bore 6|. At each end of the frame member 5 is an L-shaped plate 62 which is seated in a recess 63 provided therefor so that said plate will be below the surface of the frame member |5. Within each bore 6| is positioned a rod 64 the inner ends of which extend into the opening while the outer ends thereof project outwardly through the vertical plate portion 65 of the L-plate 62. Secured to the outer end of each rod 64 is a latch 66 adapted to project inwardly into the guide track |2 through the slot |4 thereof, said latch 66 being formed with a collar 61 adapted to engage the inside surface I3 of the guide track l2 so as to limit inward movement of the latch 66 under the action of the coil spring 66 surrounding the rod 64 and seated on the plate portion 65 and collar 61. Controlling the latches 66 are a pair of operating levers 69 having a scissor-like action extending within the opening 69 and pivotally connected therein and to said frame member |5 by the pivot III, the inner ends of said operating levers 69 being connected by a pin and slot connection to the adjacent inner ends of the rods 64.

Thus, with the Venetian blind I operatively placed within the supporting frame ID, the lazy-' tongs linkages 20 being housed within the guide tracks |2 in the manner as above set forth, the Venetian blind is held in its lowered position against the action of the springs 34 by the engagement of the latches 66 with the horizontal flanges 30 of the latch plates 29, as clearly shown in Fig. 9. To raise the Venetian blind all that is necessary is to draw the operating levers 69 together whereby the latches 66 are disengaged from the latch-plates 29, the blind being then automatically raised by the action of the coil springs 34 in the 'manner readily apparent.

It is thus seen that the Venetian blind as above described is easily operated and efficient and satisfactory in use. The slats 25 may readily be adjusted and locked in any desired angular position'to effect any desired amount of opening thus regulating both the amount of light and ventilation desired. Further by virtue of the locking and guiding mechanism, the Venetian blind provides a construction that will function to prevent entry through the window by a thief or prowler as well'as a safety device in preventing the accidental falling out of windows.

Having thus described the invention, what is claimed is: .f

1. A window shutter comprising a supporting frame adapted to snugly fit within a window opening, a plurality of slats horizontally arranged in superposed spaced relation within said frame, linkage means concealed within the vertical sides of said frame, pivot means connecting each of said slats with said linkage means, said linkagemeans being adapted to raise or lower said slats, and means carried by said frame for locking said linkage in its lowered position whereby to retain said slats in their lowered position.

, 2. In the window shutter asset forth in claim 1, wherein said linkage means is vertically contractible and extensible, and spring means connecting spaced portions of said linkage means acting to contract the same upon release of the locking meansto thereby raise said slats.

3. In the window shutter as set forth in claim 1, wherein said slats are interconnected at their adjacent edges by a' like contractible and extensible linkage for simultaneously turning said slats from an open to a closed position and vice versa, and means carried by said last mentioned linkage for locking the same against movement.

4. In the window shutter as set forth in claim 1, wherein said slats are pivotally interconnected at their forward adjacent edges by a like con.- tractible and extensible linkage for simultaneously turning said slats into selected angular positions, releasable hook means carried by said last mentioned linkage for locking the same against movement, and latch means carried by the lowermost slat arranged to coact with a portion of the supporting frame adjacent thereto for retaining said slates in their selected adjusted angular position.

5. A window shutter comprising a supporting rectangular frame having vertical hollow side members connected at their ends by upper and lower horizontal members each of said side members being medially slotted on their inner opposed sides to define a guide track, a lazy-tongs linkage comprising a plurality of interconnected cross-links positioned within each guide track and connected at its upper end to the upper end of said frame, a latch-plate connected to the lower end of each linkage, a plurality of horizontal superposed slats arrangedwithin said frame each slat having at its ends axially extending pins projecting through the slot in said guide track and constituting the pivotal connections of the crosslinks constituting said lazy-tongs linkage, whereby contraction or extension of-said linkage will impart a corresponding raising or lowering of said slats, and releasable latch means carried by the lower horizontal member arranged to engage each of said latch-plates for locking said slats in their lowered position.

6. In the window shutter as set forth in claim 5, wherein said slats are pivotally interconnected at their forward edges by a like lazy-tongs linkage for simultaneously moving said slats into varying angular positions, and a releasable hook latch provided on said last mentioned linkage to rigidly lock the same against movement.

7. In the window shutter as set forth in claim 5, including means interconnecting said slats for effecting simultaneous angular movement thereof, a spring pressed latch bolt mounted adjacent one end of the lowermost slat, an arcuate row of openings formed at the bottom of the inner side of the guide track adjacent said slat end, said openings being adapted to be selectively engaged by said latch bolt for locking said slats in their adjusted angular position. 1

8. In the Window shutter as set forth in claim 5, including a tension coil spring connected at its ends to vertically spaced cross-links of each of said lazy-tongs linkages housed within said guide tracks whereby upon release of said latch means said coil springs will act to contract said lazytongs linkages to thereby automatically raise said slats.

9. In the window shutter as set forth in claim 5, including releasable locking means carried by the lowermost of said slats for coaction with an upper portion of at least one of said guide tracks whereby to lock said slats in their raised position.

10. In the window shutter as set forth in claim 5, wherein said releasable latch means comprises a pair of rods axially movable within said lower horizontal frame member, each of said rods carrying at their outer ends a latch pin adapted to engage an associated latch-plate, spring means for urging said rods axially outwardly towards said latch plate, and an operating lever arrangement connected to the adjacent inner ends of said rods for moving the same axially inwardly to effect release of said latch means.

NICK msmmnck.

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